Feature:1. 4Pcs in 1 Set: Including 4pcs cutting heads, often used in automatic glass cutting machines to replace old or broken cutter heads.2. Tungsten Steel Wheel: The blade wheel is made of hard tungsten steel material, with high hardness and not easy to crack.3. High Carbon Steel Gasket: With widened and thickened high carbon steel gasket, has good stability and safer operation.4. Alloy Cutter Shaft: Bold alloy cutter shaft is firm and strong, rolling smoothly, and more flexible when cutting glass.5. Standard Production: With reasonable size and standard manufacturing, the cutter wheel is easy to replace and install.Specification:.Item Type: Glass Cutter HeadProduct Material: Tungsten steel + high carbon steelProduct Quantity: 4pcsProduct Height: Approx. 21mm / 0.8inProduct Diameter: Approx. 4mm / 0.2inCutter Wheel Angle145155Cutting ThicknessApprox.4-6mm / 0.16-0.24inApprox.6-12mm / 0.2-0.5inPackage List:4 x Cutter HeadNote:1. Glass cutters cannot cut high hardness objects such as tempered glass, vitrified tiles, marble, and quartz.2. Do not use on uneven glass. Do not operate directly on window, wall, or facades, but must be placed on a flat ground or desktop to operate.3. When cutting the mirror, you must scratch the front of the mirror.4. Please use broken glass to practice before using it.